<!DOCTYPE html>
<html lang="zh">
  <!DOCTYPE html>
  <html lang="zh">
    <head>
      <meta charset="UTF-8" />
      <title>CSS 基础介绍</title>
    </head>
    <body>
      <div class="bowl">
        <div class="box1">
          <div class="box1_1">r2</div>
          <div class="box1_2">r7</div>
        </div>
        <div class="box2">r3</div>
        <div class="box3">r4</div>
        <div class="box4">r5</div>
        <div class="box5">r8</div>
      </div>
    </body>
    <style>
      .box1 {
        width: 290px;
        height: 400px;
        background: white;
        float: left;
      }
      .bowl {
        width: 900px;
        height: 400px;
        background: white;
        float: left;
      }
      .box1_1 {
        width: 290px;
        height: 150px;
        background: gold;
        float: left;
      }
      .box2 {
        width: 390px;
        height: 250px;
        background: green;
        float: left;
      }
      .box3 {
        width: 90px;
        height: 250px;
        background: red;
        float: left;
      }
      .box4 {
        width: 130px;
        height: 250px;
        background: palegreen;
        float: left;
      }
      .box1_2 {
        width: 290px;
        height: 250px;
        background: rebeccapurple;
        float: left;
      }
      .box5 {
        width: 610px;
        height: 150px;
        background: peru;
        float: left;
      }
    </style>
  </html>
</html>
